时间:2019-02-23 作者:英语课 分类:英语时差8,16


英语课

A lot of people love that fresh-dirt smell. The surprising thing, though, is that it isn’t coming from the dirt itself. Microbiologists have traced the pleasant odor to an organic chemical called “geosmin.” A microbial geneticist named Keith Chater at the John Innes Center in England has traced geosmin down to a common bacterium 2 called Streptomyces coelicolor. He even found out exactly which gene 1 in the little critters causes them to produce geosmin. Interestingly enough, there are unconfirmed reports that animals are attracted to fresh dirt in the desert, and go there looking for water. As they nose around the dirt, they pick up plenty of S. coelicolor, which then hitch 3 a ride from one oasis 4 to the next. If it’s true, then the bacteria in general may create the odor in order to attract animals. The animals find water, the bacteria are spread, and everyone is happy.



n.遗传因子,基因
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
n.(pl.)bacteria 细菌
  • The bacterium possibly goes in the human body by the mouth.细菌可能通过口进入人体。
  • A bacterium is identified as the cause for his duodenal ulcer.一种细菌被断定为造成他十二指肠溃疡的根源。
v.免费搭(车旅行);系住;急提;n.故障;急拉
  • They had an eighty-mile journey and decided to hitch hike.他们要走80英里的路程,最后决定搭便车。
  • All the candidates are able to answer the questions without any hitch.所有报考者都能对答如流。
n.(沙漠中的)绿洲,宜人的地方
  • They stopped for the night at an oasis.他们在沙漠中的绿洲停下来过夜。
  • The town was an oasis of prosperity in a desert of poverty.该镇是贫穷荒漠中的一块繁荣的“绿洲”。
学英语单词
a matter of prudence
a&b bit signaling
across-the-aboard
age benefit
alaap
alkali-antimonides
Andersson
angelic non-determinism
anti-tank missile flight tester
appa
arm microprocessor
art-film
Bearish Harami
benzoyl bromide
Bescano
biological potency
blt
buried stream
call into question
change in amount consumed
checco
clock position
close-to
cold-shoulder
coloured gold
contracted farm
cooking school
cooling tray
corkscrew yarn
cosco
differentiation of spleen disease
Dumshaf Abyssal Plain
easy way
ectropion sarcomatosum
empty your mind
Encyclia citrina
euryhaline organisms
evre
exciting irradiation
extracurricular reading
flow mechanics
folin reaction
frontalis interna hyperostosis
fusion piercing
gas helmet
genus Begonia
give the key to
global assessment of functioning (gaf)
Goniosol
gonococcal endocarditis
in-pile test
interior liablities
Jaroslav Hasek
Johnny Carson
kapa
KB Required
Lam.) Gaertn.
lap-dancer
lethal index
liberated heat
limonia (dicranomyia) tattakae
lonetrexol
mag card system
MRTD
muliebrious
nativar
nicollettes
nonlinear transmittance
O. L.
obfuscous
orthodoxically
Plustrar lens
Pravia
preit
pulled your leg
quarantine regulation
relaytype
revise a budget
ruptured yolk
Scooby gang
Shilonite
single-suckling system
six-penny
ST_farming-and-forestry_commercial-fishing
Staufen
sterlington
stray customer
syn-diazotate
take out a policy on one's life
tartar steaks
traversing feed
twin market
ultimate risk
under the glare of the sun
unmesmerised
unties
wildcrafted
with hat in hand
workpack
zawacki
zeze